Device for drilling or boring polygonal-shaped openings



June 9, 1-925. 1,540,826

H. J. WATTS DEVICE FOR DRILLING OR BORING POLYGONAL SHAPED OPENINGS Filed Jan. 14, 1921 Wrmzss Patented June 9, 1925 I 'UNI TED i .nnvxonmnznmmmeon BORING PoIiYeoNAn-sHArEn OPENINGS.

h Ap n-eamnmea' January To all whom it may canoe-m g Be it known that I, HARRY J. i VATTS fiL subj ect' of the King of England, residing at Turtle Creek, inthe "county" of"Allegheny "endState ofFennsylvfania, have invented certain f new and useful Improvements in Devices for Drilling or Boring 'Polygonel- Shaped Openings, of'vvhich the followingis a (specification.

This'invention" relates to a device for'boring 'or drilling polygonal-shaped openings, of hexagonal"shape and has for its object to provide a device ofljsnch, "class; in-

manner as hereinafter set forth, with means to allow the tool-element of'thedevi'ce, to travel in a path corresponding to =thef1ength; and angles.

of a polygonahfignre,having" any desired i number of lines or ang1es,"when boring or drilling a, poiygonelishapechfigure whereby the opening'drilled or bored will correspond to theshapeofthefignre. I

A 'fin'th'erobj ect of the invention is to provide a device of siich class,"in' a nanner as hereinafter setffortlnwvith" a chnck element to control "the floating 'fzrction of the too1- elernent during the' {operation of the device, and to provide thechitck eiem ent vvith'ineans for governing the fioeting action imparted by the chuck-element to 'the tool' eiernent,

A furtherobject of the'invention is to provide a device otsneh' classyin a menner es hereinafter set'forth, with'me'ans' 1 for "reducing friction to a Ininimumhetweenthernow ing or shifting elements of the'devicej', to facilitate a smooth shifting-movement of sii'ch elements during "the operation of the device. Further objects of the invehti'on are to provide adevice of such class which is simple in its construction" and arrangement, strong, durable, 'c'on1pact,"reddi1y* assembled, efficient and convenient 'in'its use, andc01nmatively inexpensive to1manuf2ictnre.

\Vitlr the foregoing and {other objects in i 'iew the invention consists of the novei con strflction, combination and arrangement of parts -ashereinafter"more specifically) described andjilhistrated in the accompanying drawings, wherein is shown an "embodiment of the invention,"but'it is to bennderstood that ch'an'ges, variations 'and" modifications can be resorted to which ctnnefivithin the scope of the claims herermto appended.

In the' drawingswhere'indike reference characters fd'enote I j corresponding parts throughout the several views:

Figure 1," is" a section on 1ine-II Figure 2, j of e devicefor-"boring' or drilling polyg- (anal-shaped openings in accordance with this invention. v Y

Y igure 2, is esiectionon ii-'ne II--II Eig- 'ure 1. i

Figure 3, is an invertedplen "carrying member or the @hudeerement. v iFig'ure, is dtOp plan} view of the' *to'o1- element carrying member "of the chuckcicerit.

Figure 5, is a perspective view of theto'ol e-1e1r1ent for drilling or boringhexagonel "shaped openings. Figure 6, is an elevation of the guide merit. v i I i I v -Referringto the dra-wings' in deteii a de- 1 vice foi 'boring or drilling oly omrshaped *o-periings in accordance with 5 this invention "comprises n chuck-element, e tool-eiernent eleof the Si-mkend :i-"gnide element, the l-atteriassoci ating V with the techei'en'rent to provide "f0r the sh-ape or the figure and :Eo'r' guid'il'ig th'e :tool- -elern-ent -in 1ines=eorrespond1n to the shape 'of the figure, and the chuck-"element providing fo'r the necessa'ry floating action "oi? the -'tob1'-e1e-I-nent during the operation of *the de: vice so that the fi'inct'ion'ot the tool el ernent 'will besatisfactorily performed. The chnckeiement is illustrated? in connection with a t'ool elern'ent" "for drilling or boring zr hexagonalshaped opening, ibnt it :is toi bemnderstood thet t'he chi'i'ek -elenrent een 'be used with any type of tooi elenient' for which-it is found applicable. i The chuck-elementcomprises 2r rshenkcarrying member; a *tooleienrent r carrying? meniherg a combined coupling and enclosing easing; and al float action governor. 1 The :sh-ank and tool-element carrying members have as- 'sociated me'ans'to' providev for: it floating action to be" imprtrted i to the =tool'-el'em entdur- 7 ing the-operation of ithedntter;

The shank-"carrying member of the chuck e'le'ment consists ofj e eircirlar disk 7 provided on its outeriracmwith em integral shank 8,-'for the' p'urpose of connecting the receiving the tool-element," the latter being secured to the sleeve 11, by a binding screw 12. The inner face of the disk 10 is formed with a series of grooves 13, arranged in the form of a circle and which provide ball races, for the bearing balls 14. The grooves 13 are much wider than the diameter of the balls 14, but thedepth of the grooves 13 is such that the balls 14 will project thereabove, wherebywhen the disks 7 and 10 are arranged in operative relation relative to each other the disk 7 willrest on the balls 14, and bespaced from that face of the disk 10 in which the ball races are formed. e

The disks 7 and 10 have associated means to provide for imparting, to the tool-olement a floating action during the operation of the device, and that part of such means relative to the disk 7 consists of a circular cavity. 15, arranged centrally of the inner face of the disk 7, and a series of equally distant and radially disposed recesses 16, which open into the cavity 15. That part of such means relative to the disk 10, consists of a circular offset 17 on the inner face of the disk 10 and which extends into and is of less diameter than the cavity 15.

Projecting from the offset 17, is a series of e'qui-distant and radially disposed arms 18, arranged in pairs, and in each pair ofarms is pivotally and eccentrically mounted a roller 19.

the rollers acting against the walls of the recesses 16 will cause the disk 10 to revolve with the disk 7 and further cause a floating action of" the disk 1O, while re volving, so that the tool element-j carried the guide element through which the tool element operates. As the rollers 19 are eceentrically mounted theengagement of the edges thereof with the walls of therecesses 16, at certain points thereof will be constant whereby a continuous revolving and floating action will always be impartedto the disk 10 and tool element.

The combined coupling and enclosing casing of the chuck-element is formed from an annular body '20, having its lower end formed with an inwardly extending annular flange'21, througl'i which extends the sleeve 11. The flange 21 is formed with an upwardly disposed annular ridge'22, on which is mounted the disk 10. The function of the ridge 22, isto reduce friction to a minimum during the floating action of the disk 10, and tool-element while the latter is being driven from the disk 7. The body is formed with interior threads which engage with the peripheral threads 9' of the'disk 7 ,:whereby the body is connected to the disk 7 and supports and couples The pairs of arms and rollers extend into the recesses 16. The edges of I opening.

by this arrangement the lands, 32, 32

the disk 10 with the disk 7. 7 A binding screw 23 is provided. for forcing an abutment member 23 against the body 20 to prevent shifting thereof; The opening formed by the flange 21 is of materially greater diameter than the sleeve 11 and the edge of the flange canbe employed to limit the floating action of the disk 10.

For governing the floating action of the disklO, as well as providing a dust guard a float actiongovernor is provided, and

which comprises a collar having its upper portion 2 1 ofkgreater thicknessthan the, lower port1on25, and pro ecting from the upper portion 24: of the collar is an annular flange 26 which extends beyond the edge of the flange 21. The float action governor .is adaptedcto be detachably secured to the sleeve 11, as shown in Figure 1, and in this connection the thicker portion of the col lair is arranged between the flange 21 and the sleeve 11 and wh ch acts as a means for governing the, floating action of the disk 10, but if the floating movement of thedisk drilled or bored, As shown the guide meinher is provlded with an hexagonal-shaped.

heir the guide element is in use it is secured tothat'face of the WOIi to be operatedon. V

The tool-element @comprises .abody portion 29 and a shank 30,- provided 'ivitli flats 30. The shank is extended into the sleeve 11, and secured therewith jby the binding screw 12 abutting against aflat The body portion 29 is cylindrical and cutaway to provide threeflutes 31, for the passage of chips during the cuttingoperation. Two of the flutes 31 are provided on one side of the body portion andjth'e other flute 31 on the otherside of the body portion and and 33 are formed, the land 33 being of less width than the other two lands. At the operative end ofthe tool-elementthree cutting edges 34;, 35 and 36 are provided. The land 33 inclines inwardly and each ofthe lands 30, 32, is rounded inwardly. That part of the body portion 29 between the flutes ateach-side of the land 32 isinelined with respect to thecutting edge 35.

One wall of each flute at a cutting edge is ground back as at32? toovercome cutting of rounded corners or in other words it prorgsaogee'e vides for cutting ofisharp corners;

'lhat p-art ot' the body portion 29, at the operative end of the "tool-element between the flutes at each side' of theland 32 inclines disposed that when the tool-element is in operative position and in connectionevith the floating action from'thechuek-a hexagonal shaped-figure will-bev produced.

I am well aware,'that-prior-toany invention of this-tool, that all-tools forboring or drilling 'polygonalshaped openings of hexagonal contour, must-beso setup as to have one less cutting lipthan the number of walls of the iopeni-ng to' be formed and one less cuttinglipthanthenumber of walls of th'e'opening in the toolwguide. The tool of my invention for drilling orboring a hexagonal shaped opening-is provided with but three cutting lips, whereas heretoiore it required live cutting lips. The explanation as to'wh'y a'threelippedtool, in accordance with .this intention, will out a'heX is':

Take a tool with five-cutting lips, which are numbered on'e,.two, three, foura-nd five, now

remove the F lips" three and five, which places two lips on one side of the tool andone lip on the other, there is .notliing to-prevent the remaining ill )8 Loredges from following the same course as'providedby the tool guide as it the tool had the live lips or cutting edges. When the tool is set up however, with three lands, two of which are of greater length than the other and the cutting edges are arranged on the leading side edges of the lands, the follower side edge of the land o'l smaller width is in a plane intersecting the inner portion of the leading side edge of one of the lands of greater width and is spaced from the leading side edge of the other land of greater width and the disposition of the leading side edges of the lands provides, in connection with the guide element, fora three lipped tool to form a hexagonal shaped opening during the operation of the tool relative to the work.

The device can perform its function whether it is rotated bodily with the work stationary, or the device held stationary and the work revolved, in either case the'tunction performed is the same.

l Vhat I claim is 1. A device for the purpose set forth comprising a chuck-element provided with a revolvable shank carrying member and a fioatable tool-element carrying member connected therewith, one of said members provided in one face with' a plurality of ratlial- 1y disposed recesses and the :other carrfiin-l on one 'lace a plurality of eccentrically mounted pivoted members each moving lengthwise bf and operating. against 'the walls of a recess for impartingafloating ae "tion "to the tool-carrying L member during t-he revolvingof the shank carrying member.

2.- A, devicefor the purpose set 'l orth'comprising a revolvable chuck-elen'ient including a pairotdisks andihavmg eccentrically mounted-radially shittable pivoted members 'carrijed l'iy one disk-and bodily and radially shili'table within and travelling against the" other oi'the disas -for impartinga floating action to one of the disksduring their-evolving of the ch uck, a toolwelern'ent carried by thatdisk to which the floatingaction is imparted, and aguide element associated with the=tool-elen1ent v 3. A-devlce for the purpose set forth comprising-a revolvabl'e chuck-element includ mg a pair of dlsks and -"l'u rther having cc centric-ally mounted radiallyshiftable pi ot-ed members ca: ied byon'ediskand bodily and radially shiftable within and travelling against the other o'fthe disks for imparting a floating actionto one ofthe disks during the revolvingof the chuck, a tool-element carried by that d sk to WlUCh the floating action is imparted, a guideaelementsassociated with the tool-elen1ent, andmeans for con trolling the extent of the floating action inipa-is'ted' to that disk carrying "the tool-elel. Adevice toi the purpose set forth cont;

men-t.

prising revolvable chuck 'element inelnding' a pair'otdisks, one of said disks having a cavity and a plurality of radially disposed recesses projecting from the wall of: said cavity and the other of said disk extended into said cavity and carrying a plurality of eccentri -ally mounted pivoted radially (lisposed i'nen'ibers travelling inwardly and outwardly against the walls of the recesses for imparting a floating action to one of the disks during the revolving ofthe chuck element, and bearing balls interposed between the disks. 7 V

5. A device for the purpose setforth comn'ising a 'revolvable chuck element includ ing a pair of disks coupled together and one provided with a plurality oi radially disposed recesses and the other with eccentrically mounted pivoted members travelling inwardly and outwardly against the walls of the recesses for imparting a floating action to one of the disks during the revolving of the chuck-'element, bearing means in terposed between said disks, a tool-element carried by that disk to which the floating action is impartechand a guide element for the tool-element. V

6. A'device for the purpose set forth comprising a revolvable chuck element providmi ed with radially disposed recesses and fur ther including a shiftable member revolving with the said element, eccentrically mounted means forming a part of the chuck element and travelling against the walls of saidrecesses for imparting a floatmg actionto said memberduring the revolving of the chuck element, a tool element carried by said n'ien'iber, and a guide element associat- 1.) ed with the tool-element.

i5 therewith and further including a plurality of eccentrically, mounted rollers travelling against the walls of said recesses for inrparting a floating action to said member during the revolving of the chuck element,

means for governing the floating action of said member, a tool-element carried by said member, and a guide element associated with the tool-element. i

'8. A device for the purpose set forth comprising a chuck-element provided therein with radially disposed recesses and further including a shittable member and eccentrically mounted means travelling against the walls of the recesses for imparting a floating 20 action to said member, a tool carried by said member, and a' guide element associated with the tool element.

9. A device for the purpose set forthcomprising a chuck element provided therein with radially disposed recesses andfurther including a shiftable member and eccentrically mounted means travelllng against the walls of the recesses for imparting a-fioat- 7 ing action to saidmember,a.tool carried by said member, .a guide element associated with the tool element, and means carried by the tool elem'ent for governing the floating action of thesaid member.

10. A device for drilling or boring hexagonal shaped openings comprising the combination with a floating tool chuck, and a guide having a hexagonal shaped opening,

of a tool carried by the chuck and extending through the guide and provided with a parrot fiutes'on one side and a-flute on the other side of its cutting end thereby forming three lands, two of greater width than the other and with the leading side edge of each land constituting a cutting edge, that land of less width having its outeredge inclined inwardly.

11. A device for drilling or boring hexagonal shaped openings comprising a combination with a floating tool chuck and a guide having a hexagonal shaped opening, of a tool carried by the chuck and extend ing through the guide and provided with a pair of, flutes on one sideand a flute on the other side of its cutting end, thereby forming three lands two 01 greater Width than the other and with the leading side edge of each land constituting a cutting edge, that land ofles's width having its outer edge inclining inwardly, the follower edge of the land of less width disposed in a plane intersecting the inner portion of the cutting edge of a land of greater Width and spaced by a flute from the cutting edge of the other land of greater Width.

In testimony whereof I aflix my signature.

HARRY J. WATTS. 

